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7.4 running rich

Mercury MerCruiser

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Old 04-13-2014, 05:29 AM   #1
 
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Default 7.4 running rich

Hi all. Got my 7.4 running with a rebuild kit in the weber/edelbrock carb. I set the floats to spec. Starts on first crank every time. Seems to be a little rich though, as I can smell it a little. Are the marine engines supposed to be a little on the rich side?


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1996 Mariah Talari Z240 7.4 Merc Bravo III

As long as you have a few nuts, bolts and screws left over after the job is done, it should work!
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  • Old 04-13-2014, 02:42 PM   #2
     
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    Default Re: 7.4 running rich

    Hey Paul ,
    Hook up a vacuum gauge to a vacuum port on the base of your Weber.
    Adjust the idle/air screws til you have optimum vacuum , that should solve it for ya.
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    Old 04-13-2014, 02:44 PM   #3
     
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    Default Re: 7.4 running rich

    Ok Larry. I'll have to go to a plug on my intake to get some vac. My weber has no ports on it


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    1996 Mariah Talari Z240 7.4 Merc Bravo III

    As long as you have a few nuts, bolts and screws left over after the job is done, it should work!
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    Old 04-13-2014, 02:46 PM   #4
     
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    Default Re: 7.4 running rich

    It should still work fine Paul
    Just make sure you keep the screws out the same number of turns , or at least very close.
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    Old 04-13-2014, 02:50 PM   #5
     
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    Default Re: 7.4 running rich

    Gotcha. I prolly need to check the plugs and my timing too. I think that's the only two things I haven't looked at on this thing. I better get on the ball- weather is warming up quick here


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    1996 Mariah Talari Z240 7.4 Merc Bravo III

    As long as you have a few nuts, bolts and screws left over after the job is done, it should work!
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    Old 04-13-2014, 03:05 PM   #6
     
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    Default Re: 7.4 running rich

    Your in the 80s already ain't ya?
    I'm jealous!
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    Old 04-13-2014, 03:18 PM   #7
     
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    Default Re: 7.4 running rich

    Took mine out yesterday for about 2 hours..I love it when we can get back on the water.
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    Old 04-13-2014, 03:26 PM   #8
     
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    Default Re: 7.4 running rich

    Yeah , yeah............rub it in Mariah1.
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    Old 04-13-2014, 03:39 PM   #9
     
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    Default 7.4 running rich

    Just great day for the ride. She started her 21st year of service yesterday. My passengers yesterday could have cared less.


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    Old 04-13-2014, 05:21 PM   #10
     
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    Default Re: 7.4 running rich

    We've had a few low 80's days already. Humid as all get out. Mosquitos and wasps are already out, some are big enough to carry a small dog away


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    1996 Mariah Talari Z240 7.4 Merc Bravo III

    As long as you have a few nuts, bolts and screws left over after the job is done, it should work!
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